<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        #d1{color: green}
        .c1{color: blue}
        h1,h2{background-color: yellow}
        [type='submit']{background-color: red}
        *{border: 1px solid blue}
    </style>
</head>
<body>
<ul>
    <li class="c1">刘德华</li><li id="d1">张学友</li><li>郭富城</li>
</ul>
<h1 class="c1">刘备</h1><h1>关羽</h1><h1>张飞</h1>
<h2>曹操</h2>
<input type="submit" value="提交按钮">
<input type="button" value="普通按钮">
</body>
</html>